1+1/(1+√2)
    1+1/1+√2
    （1.02+2.06）*0.95/2-（0.8+2.06）*0.7/2
    0.000001769*150.946^3 - 0.000788056*150.946^2 + 0.113853704*150.946 - 4.914000000
    2*10^(-6)*150.946^3-0.00088*150.946^2+0.1139*150.946-4.914
    2*10^(-6)*150.946^3-0.00088150.946^2+0.1139*150.946-4.914
    -0.0022*150.946+ 0.7368
    2*10^(-06)*150.946^2-0.0008*150.946^2+0.1139*150.946-4.914
    2E-06*150.946^2-0.0008*150.946^2+0.1139*150.946-4.914
    4*-3/abs(-3)
    （140.01^2-120^2）/15.31
    （140.84^2-120^2）/3.39
    （143.58^2-120^2）/12.73
    （147.3^2-120^2）/36.87
    （148^2-120^2）/6.67
    （148^2-120^2）/120
    2*0.7-5
    2.246^2
    0.4*2.27
    0.35*tan66

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